javascript - Two tables vertically aligned, how to synchronise the widths/spacing?

Question

So that I can have a scrollable table with the heading row fixed at the top I have seperated the headers into their own table in a seperate div. The div below has the table data. The contents of the table varies and so I wish to be able to synchronise the top table with the spacings and widths of the rows below so that the header lines up exactly. How can I do this?

[header 1|header 2|header3]
[cell1       | cell2    |        cell3]

so that:

[header 1    | header 2|     header 3]
[cell1       | cell2   |        cell3]

Answer 1

Try this

http://jsfiddle.net/gZTsr/6/

HTML:

    <div id="tableContainer" class="tableContainer">
<table border="0" cellpadding="0" cellspacing="0" width="100%" class="scrollTable">
<thead class="fixedHeader">
    <tr class="alternateRow">
        <th>Header 1</th>
        <th>Header 2</th>
        <th>Header 3</th>
    </tr>
</thead>
<tbody class="scrollContent">
    <tr class="normalRow">
        <td>Cell Content 1 da widim dali she se sinkne kato mu nabiem kancheto s 200000 simvola otgore</td>
        <td>Cell Content 2</td>
        <td>Cell Content 3</td>
    </tr>
    <tr class="alternateRow">
        <td>More Cell Content 1</td>
        <td>More Cell Content 2</td>
        <td>More Cell Content 3</td>
    </tr>
    <tr class="normalRow">
        <td>Even More Cell Content 1</td>
        <td>Even More Cell Content 2</td>
        <td>Even More Cell Content 3</td>
    </tr>
    <tr class="alternateRow">
        <td>And Repeat 1</td>
        <td>And Repeat 2</td>
        <td>And Repeat 3</td>
    </tr>
    <tr class="normalRow">
        <td>Cell Content 1</td>
        <td>Cell Content 2</td>
        <td>Cell Content 3</td>
    </tr>
    <tr class="alternateRow">
        <td>More Cell Content 1</td>
        <td>More Cell Content 2</td>
        <td>More Cell Content 3</td>
    </tr>
    <tr class="normalRow">
        <td>Even More Cell Content 1</td>
        <td>Even More Cell Content 2</td>
        <td>Even More Cell Content 3</td>
    </tr>
    <tr class="alternateRow">
        <td>And Repeat 1</td>
        <td>And Repeat 2</td>
        <td>And Repeat 3</td>
    </tr>
    <tr class="normalRow">
        <td>Cell Content 1</td>
        <td>Cell Content 2</td>
        <td>Cell Content 3</td>
    </tr>
    <tr class="alternateRow">
        <td>More Cell Content 1</td>
        <td>More Cell Content 2</td>
        <td>More Cell Content 3</td>
    </tr>
    <tr class="normalRow">
        <td>Even More Cell Content 1</td>
        <td>Even More Cell Content 2</td>
        <td>Even More Cell Content 3</td>
    </tr>
    <tr class="alternateRow">
        <td>And Repeat 1</td>
        <td>And Repeat 2</td>
        <td>And Repeat 3</td>
    </tr>
    <tr class="normalRow">
        <td>Cell Content 1</td>
        <td>Cell Content 2</td>
        <td>Cell Content 3</td>
    </tr>
    <tr class="alternateRow">
        <td>More Cell Content 1</td>
        <td>More Cell Content 2</td>
        <td>More Cell Content 3</td>
    </tr>
    <tr class="normalRow">
        <td>Even More Cell Content 1</td>
        <td>Even More Cell Content 2</td>
        <td>Even More Cell Content 3</td>
    </tr>
    <tr class="alternateRow">
        <td>And Repeat 1</td>
        <td>And Repeat 2</td>
        <td>And Repeat 3</td>
    </tr>
    <tr class="normalRow">
        <td>Cell Content 1</td>
        <td>Cell Content 2</td>
        <td>Cell Content 3</td>
    </tr>
    <tr class="alternateRow">
        <td>More Cell Content 1</td>
        <td>More Cell Content 2</td>
        <td>More Cell Content 3</td>
    </tr>
    <tr class="normalRow">
        <td>Even More Cell Content 1</td>
        <td>Even More Cell Content 2</td>
        <td>Even More Cell Content 3</td>
    </tr>
    <tr class="alternateRow">
        <td>And Repeat 1</td>
        <td>And Repeat 2</td>
        <td>And Repeat 3</td>
    </tr>
    <tr class="normalRow">
        <td>Cell Content 1</td>
        <td>Cell Content 2</td>
        <td>Cell Content 3</td>
    </tr>
    <tr class="alternateRow">
        <td>More Cell Content 1</td>
        <td>More Cell Content 2</td>
        <td>More Cell Content 3</td>
    </tr>
    <tr class="normalRow">
        <td>Even More Cell Content 1</td>
        <td>Even More Cell Content 2</td>
        <td>Even More Cell Content 3</td>
    </tr>
    <tr class="alternateRow">
        <td>And Repeat 1</td>
        <td>And Repeat 2</td>
        <td>And Repeat 3</td>
    </tr>
    <tr class="normalRow">
        <td>Cell Content 1</td>
        <td>Cell Content 2</td>
        <td>Cell Content 3</td>
    </tr>
    <tr class="alternateRow">
        <td>More Cell Content 1</td>
        <td>More Cell Content 2</td>
        <td>More Cell Content 3</td>
    </tr>
    <tr class="normalRow">
        <td>Even More Cell Content 1</td>
        <td>Even More Cell Content 2</td>
        <td>Even More Cell Content 3</td>
    </tr>
    <tr class="alternateRow">
        <td>And Repeat 1</td>
        <td>And Repeat 2</td>
        <td>And Repeat 3</td>
    </tr>
    <tr class="normalRow">
        <td>Cell Content 1</td>
        <td>Cell Content 2</td>
        <td>Cell Content 3</td>
    </tr>
    <tr class="alternateRow">
        <td>More Cell Content 1</td>
        <td>More Cell Content 2</td>
        <td>More Cell Content 3</td>
    </tr>
    <tr class="normalRow">
        <td>Even More Cell Content 1</td>
        <td>Even More Cell Content 2</td>
        <td>Even More Cell Content 3</td>
    </tr>
    <tr class="alternateRow">
        <td>And Repeat 1</td>
        <td>And Repeat 2</td>
        <td>And Repeat 3</td>
    </tr>
    <tr class="normalRow">
        <td>Cell Content 1</td>
        <td>Cell Content 2</td>
        <td>Cell Content 3</td>
    </tr>
    <tr class="alternateRow">
        <td>More Cell Content 1</td>
        <td>More Cell Content 2</td>
        <td>More Cell Content 3</td>
    </tr>
    <tr class="normalRow">
        <td>Even More Cell Content 1</td>
        <td>Even More Cell Content 2</td>
        <td>Even More Cell Content 3</td>
    </tr>
    <tr class="alternateRow">
        <td>And Repeat 1</td>
        <td>And Repeat 2</td>
        <td>And Repeat 3</td>
    </tr>
    <tr class="normalRow">
        <td>Cell Content 1</td>
        <td>Cell Content 2</td>
        <td>Cell Content 3</td>
    </tr>
    <tr class="alternateRow">
        <td>More Cell Content 1</td>
        <td>More Cell Content 2</td>
        <td>More Cell Content 3</td>
    </tr>
    <tr class="normalRow">
        <td>Even More Cell Content 1</td>
        <td>Even More Cell Content 2</td>
        <td>Even More Cell Content 3</td>
    </tr>
    <tr class="alternateRow">
        <td>And Repeat 1</td>
        <td>And Repeat 2</td>
        <td>And Repeat 3</td>
    </tr>
    <tr class="normalRow">
        <td>Cell Content 1</td>
        <td>Cell Content 2</td>
        <td>Cell Content 3</td>
    </tr>
    <tr class="alternateRow">
        <td>More Cell Content 1</td>
        <td>More Cell Content 2</td>
        <td>More Cell Content 3</td>
    </tr>
    <tr class="normalRow">
        <td>Even More Cell Content 1</td>
        <td>Even More Cell Content 2</td>
        <td>Even More Cell Content 3</td>
    </tr>
    <tr class="alternateRow">
        <td>End of Cell Content 1</td>
        <td>End of Cell Content 2</td>
        <td>End of Cell Content 3</td>
    </tr>
</tbody>
</table>
</div>

CSS:

    body {
    background: #FFF;
    color: #000;
    font: normal normal 12px Verdana, Geneva, Arial, Helvetica, sans-serif;
    margin: 10px;
    padding: 0
}

div.tableContainer {
    clear: both;
    border: 1px solid #963;
    height: 285px;
    overflow: auto;
    width: 756px
}

/* Reset overflow value to hidden for all non-IE browsers. */
html>body div.tableContainer {
    overflow: hidden;
    width: 756px
}

/* define width of table. IE browsers only                 */
div.tableContainer table {
    float: left;
    width: 740px
}

/* define width of table. Add 16px to width for scrollbar.           */
/* All other non-IE browsers.                                        */
html>body div.tableContainer table {
    width: 756px
}

/* set table header to a fixed position. WinIE 6.x only                                       */
/* In WinIE 6.x, any element with a position property set to relative and is a child of       */
/* an element that has an overflow property set, the relative value translates into fixed.    */
/* Ex: parent element DIV with a class of tableContainer has an overflow property set to auto */
thead.fixedHeader tr {
    position: relative
}

/* set THEAD element to have block level attributes. All other non-IE browsers            */
/* this enables overflow to work on TBODY element. All other non-IE, non-Mozilla browsers */
html>body thead.fixedHeader tr {
    display: block
}

/* make the TH elements pretty */
thead.fixedHeader th {
    background: #C96;
    border-left: 1px solid #EB8;
    border-right: 1px solid #B74;
    border-top: 1px solid #EB8;
    font-weight: normal;
    padding: 4px 3px;
    text-align: left
}

/* make the A elements pretty. makes for nice clickable headers                */
thead.fixedHeader a, thead.fixedHeader a:link, thead.fixedHeader a:visited {
    color: #FFF;
    display: block;
    text-decoration: none;
    width: 100%
}

/* make the A elements pretty. makes for nice clickable headers                */
/* WARNING: swapping the background on hover may cause problems in WinIE 6.x   */
thead.fixedHeader a:hover {
    color: #FFF;
    display: block;
    text-decoration: underline;
    width: 100%
}

/* define the table content to be scrollable                                              */
/* set TBODY element to have block level attributes. All other non-IE browsers            */
/* this enables overflow to work on TBODY element. All other non-IE, non-Mozilla browsers */
/* indu